Use a direct include of strings headers in net/test/, net/third_party/, net/tools/, net/udp/, net/u…

net/test/embedded_test_server/http_response.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/test/embedded_test_server/http_response.h"
 
 #include "base/format_macros.h"
 #include "base/logging.h"
-#include "base/stringprintf.h"
+#include "base/strings/stringprintf.h"
 
 namespace net {
 namespace test_server {
 
 HttpResponse::~HttpResponse() {
 }
 
 BasicHttpResponse::BasicHttpResponse() : code_(SUCCESS) {
 }
 
@@ skipping 28 matching lines @@
                         header_name.c_str(),
                         header_value.c_str());
   }
   base::StringAppendF(&response_builder, "\r\n");
 
   return response_builder + content_;
 }
 
 }  // namespace test_server
 }  // namespace net